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MAINTENANCE
REPLACE FUEL FILTER CARTRIDGE
The parts are at high temperature immediately after the
●
engine has been operated. Wait for all parts to cool down
before replacing the filter.
Do not bring fire or sparks near the fuel.
●
Prepare a filter wrench and a container to catch the fuel.
Use a genuine Komatsu filter cartridge.
1. Set the container to catch the fuel under the filter cartridge.
2. Using a filter wrench, turn filter cartridge (1) counterclockwise
to remove it.
3. Clean the filter holder, fill a new filter cartridge with clean fuel,
coat the packing surface with engine oil, then install it to the
filter holder.
4. After bringing the packing surface into contact with the seal
surface of the filter holder, tighten it a further 1/2 turns.
If the filter cartridge is tightened too far, the packing will be
damaged and this will lead to leakage of fuel. If the filter car-
tridge is too loose, fuel will leak from the packing, so tighten it
carefully.
5. After replacing the fuel filter cartridge, bleed the air from the
system. Bleed the air as follows.
6. Fill the fuel tank with fuel (to the position where the float is at
the highest position).
7. After replacing filter cartridge (1), loosen air bleed plug (3).
8. Operate the hand lever (2) until the fuel flowing from the fitting
is free of air.
9. Tighten air bleed plug (3).
Torque value: 9 Nm
After replacing the filter cartridge, start the engine and
❍
check for any leakage of oil from the filter seal surface.
REMARK
Use the feed pump to bleed air from the fuel system, when
the machine has run out of fuel, too.
WARNING
SERVICE PROCEDURE
3
1
2
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